@keiroservices Not offhand but you can probably do something like the following.

.page-item-XX a,
.menu-item-XX a { /* this will depend on whether you're using a custom menu or not */
background: url(http://example.com/image.jpg) no-repeat; /* a link to the image you're using */
text-indent: -9000px; /* This will hide the text */
width: 20px; /* use the appropriate width for your graphic*/
}

Each menu item will be wrapped in a list element with a class that matches up with a particular number. You can use that number to target each link, replace the image, and then … success! I like to use Firebug to find out the correct class.

If you just want to add an image next to each link you can skip the text-indent and the width properties and add some left-padding to the link.